Beam switching for a multi-SIM user equipment

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a beam measurement report associated with a serving beam of the UE. The UE may determine that a timer, relative to transmission of the beam measurement report, has expired. The UE may perform a measurement of one or more neighbor beams based at least in part on determining that the timer has expired. Numerous other aspects are provided.

What is claimed is: 
     
       1. A method of wireless communication performed by a user equipment (UE), comprising:
 transmitting, to a base station, a beam measurement report associated with a serving beam of the UE, the UE comprising a multi-subscriber identification module (multi-SIM) device, and the serving beam and one or more neighbor beams are associated with a first subscription of the UE; 
 determining that, during a countdown of a timer, relative to transmission of the beam measurement report, a modem of the UE switches to processing a second subscription of the UE; 
 determining, after transmitting the beam measurement report and prior to receiving, from the base station, any communication configuring beam measurements for the one or more neighbor beams, that the timer has expired; and 
 performing a measurement of the one or more neighbor beams based at least in part on determining that the timer has expired. 
 
     
     
       2. The method of  claim 1 , wherein transmitting the beam measurement report comprises:
 transmitting the beam measurement report based at least in part on mobility of the UE. 
 
     
     
       3. The method of  claim 1 , further comprising:
 determining that a measurement of the serving beam does not satisfy a measurement threshold; and 
 wherein performing the measurement of the one or more neighbor beams comprises:
 performing the measurement of the one or more neighbor beams based at least in part on determining that the measurement of the serving beam does not satisfy the measurement threshold. 
 
 
     
     
       4. The method of  claim 1 , further comprising:
 transmitting another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; 
 
 determining that a quantity of beam failure instances on the serving beam satisfies a threshold prior to expiration of another timer relative to transmission of the other beam measurement report; and 
 initiating a random access channel (RACH) procedure on a neighbor beam of the one or more neighbor beams based at least in part on determining that the quantity of beam failure instances satisfies the threshold. 
 
     
     
       5. The method of  claim 4 , wherein the other timer is associated with the UE and the base station being out of sync on the serving beam. 
     
     
       6. The method of  claim 4 , wherein determining that the other timer has expired comprises:
 determining, after transmitting the other beam measurement report, that the other timer has expired before any communication associated with a beam switch procedure for the UE is received from the base station. 
 
     
     
       7. The method of  claim 1 , further comprising:
 transmitting another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 receiving, from the base station and based at least in part on transmitting the other beam measurement report, an indication to perform a beam switch procedure to switch from the serving beam to a neighbor beam of the one or more neighbor beams. 
 
     
     
       8. A user equipment (UE) for wireless communication, comprising:
 a memory; and 
 one or more processors coupled to the memory, the one or more processors configured to:
 transmit, to a base station, a beam measurement report associated with a serving beam of the UE, the UE comprising a multi-subscriber identification module (multi-SIM) device, and the serving beam and one or more neighbor beams are associated with a first subscription of the UE; 
 determine that, during a countdown of a timer, relative to transmission of the beam measurement report, a modem of the UE switches to processing a second subscription of the UE; 
 determine, after transmitting the beam measurement report and prior to receiving, from the base station, any communication configuring beam measurements for the one or more neighbor beams, that the timer has expired; and 
 perform a measurement of the one or more neighbor beams based at least in part on determining that the timer has expired. 
 
 
     
     
       9. The UE of  claim 8 , wherein the one or more processors, when transmitting the beam measurement report, are configured to:
 transmit the beam measurement report based at least in part on mobility of the UE. 
 
     
     
       10. The UE of  claim 8 , wherein the one or more processors are further configured to:
 determine that a measurement of the serving beam does not satisfy a measurement threshold; and 
 wherein the one or more processors, when performing the measurement of the one or more neighbor beams, are configured to:
 perform the measurement of the one or more neighbor beams based at least in part on determining that the measurement of the serving beam does not satisfy the measurement threshold. 
 
 
     
     
       11. The UE of  claim 8 , wherein the one or more processors are further configured to:
 transmit another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; 
 
 determine that a quantity of beam failure instances on the serving beam satisfies a threshold prior to expiration of another timer relative to transmission of the other beam measurement report; and 
 initiate a random access channel (RACH) procedure on a neighbor beam of the one or more neighbor beams based at least in part on determining that the quantity of beam failure instances satisfies the threshold. 
 
     
     
       12. The UE of  claim 11 , wherein the other timer is associated with the UE and the base station being out of sync on the serving beam. 
     
     
       13. The UE of  claim 11 , wherein the one or more processors, when determining that the other timer has expired, are configured to:
 determine, after transmitting the other beam measurement report, that the other timer has expired before any communication associated with a beam switch procedure for the UE is received from the base station. 
 
     
     
       14. The UE of  claim 8 , wherein the one or more processors are further configured to:
 transmit another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 receive, from the base station and based at least in part on transmitting the other beam measurement report, an indication to perform a beam switch procedure to switch from the serving beam to a neighbor beam of the one or more neighbor beams. 
 
     
     
       15. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
 one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
 transmit, to a base station, a beam measurement report associated with a serving beam of the UE, the UE comprising a multi-subscriber identification module (multi-SIM) device, and the serving beam and one or more neighbor beams are associated with a first subscription of the UE; 
 determine that, during a countdown of a timer, relative to transmission of the beam measurement report, a modem of the UE switches to processing a second subscription of the UE; 
 determine, after transmitting the beam measurement report and prior to receiving, from the base station, any communication configuring beam measurements for the one or more neighbor beams, that the timer has expired; and 
 perform a measurement of the one or more neighbor beams based at least in part on determining that the timer has expired. 
 
 
     
     
       16. The non-transitory computer-readable medium of  claim 15 , wherein the one or more instructions further cause the UE to:
 determine that a measurement of the serving beam does not satisfy a measurement threshold; and 
 wherein the one or more instructions, that cause the UE to perform the measurement of the one or more neighbor beams, cause the UE to:
 perform the measurement of the one or more neighbor beams based at least in part on determining that the measurement of the serving beam does not satisfy the measurement threshold. 
 
 
     
     
       17. The non-transitory computer-readable medium of  claim 15 , wherein the one or more instructions further cause the UE to:
 transmit another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; 
 
 determine that a quantity of beam failure instances on the serving beam satisfies a threshold prior to expiration of another timer relative to transmission of the other beam measurement report; and 
 initiate a random access channel (RACH) procedure on a neighbor beam of the one or more neighbor beams based at least in part on determining that the quantity of beam failure instances satisfies the threshold. 
 
     
     
       18. The non-transitory computer-readable medium of  claim 15 , wherein the one or more instructions further cause the UE to:
 transmit another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 receive, from the base station and based at least in part on transmitting the other beam measurement report, an indication to perform a beam switch procedure to switch from the serving beam to a neighbor beam of the one or more neighbor beams. 
 
     
     
       19. An apparatus for wireless communication, comprising:
 means for transmitting, to a base station, a beam measurement report associated with a serving beam of the apparatus, the apparatus comprising a multi-subscriber identification module (multi-SIM) device, and the serving beam and one or more neighbor beams are associated with a first subscription of the apparatus; 
 means for determining that, during a countdown of a timer, relative to transmission of the beam measurement report, a modem of the apparatus switches to processing a second subscription of the apparatus; 
 means for determining, after transmitting the beam measurement report and prior to receiving, from the base station, any communication configuring beam measurements for the one or more neighbor beams, that the timer has expired; and 
 means for performing a measurement of the one or more neighbor beams based at least in part on determining that the timer has expired. 
 
     
     
       20. The apparatus of  claim 19 , wherein the means for transmitting the beam measurement report comprises:
 means for transmitting the beam measurement report based at least in part on mobility of the apparatus. 
 
     
     
       21. The apparatus of  claim 19 , further comprising:
 means for determining that a measurement of the serving beam does not satisfy a measurement threshold; and 
 wherein the means for performing the measurement of the one or more neighbor beams comprises:
 means for performing the measurement of the one or more neighbor beams based at least in part on determining that the measurement of the serving beam does not satisfy the measurement threshold. 
 
 
     
     
       22. The apparatus of  claim 19 , further comprising:
 means for transmitting another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; 
 
 means for determining that a quantity of beam failure instances on the serving beam satisfies a threshold prior to expiration of another timer relative to transmission of the other beam measurement report; and 
 means for initiating a random access channel (RACH) procedure on a neighbor beam of the one or more neighbor beams based at least in part on determining that the quantity of beam failure instances satisfies the threshold. 
 
     
     
       23. The apparatus of  claim 22 , wherein the other timer is associated with the apparatus and the base station being out of sync on the serving beam. 
     
     
       24. The apparatus of  claim 22 , wherein the means for determining that the other timer has expired comprises:
 means for determining, after transmitting the other beam measurement report, that the other timer has expired before any communication associated with a beam switch procedure for the apparatus is received from the base station. 
 
     
     
       25. The method of  claim 1 , further comprising:
 transmitting another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 switching to a neighbor beam, of the one or more neighbor beams, based at least in part on determining that a response to the other beam measurement is not received from the base station. 
 
     
     
       26. The UE of  claim 8 , wherein the one or more processors are further configured to:
 transmit another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 switch to a neighbor beam, of the one or more neighbor beams, based at least in part on determining that a response to the other beam measurement is not received from the base station. 
 
     
     
       27. The non-transitory computer-readable medium of  claim 15 , wherein the one or more instructions that cause the UE to transmit the beam measurement report, further cause the UE to:
 transmit the beam measurement report based at least in part on a mobility of the UE. 
 
     
     
       28. The non-transitory computer-readable medium of  claim 16 , wherein the other timer is associated with the UE and the base station being out of sync on the serving beam. 
     
     
       29. The non-transitory computer-readable medium of  claim 16 , wherein the one or more instructions that cause the UE to determine that the other timer has expired, further cause the UE to:
 determine, after transmitting the other beam measurement report, that the other timer has expired before any communication associated with a beam switch procedure for the UE is received from the base station. 
 
     
     
       30. The apparatus of  claim 19 , further comprising:
 means for transmitting another beam measurement report to the base station,
 wherein the other beam measurement report is associated with the measurement of the one or more neighbor beams; and 
 
 means for receiving, from the base station and based at least in part on transmitting the other beam measurement report, an indication to perform a beam switch procedure to switch from the serving beam to a neighbor beam of the one or more neighbor beams.